WO2017075802A1 - Rapports de csi dans un système de communication sans fil - Google Patents

Rapports de csi dans un système de communication sans fil Download PDF

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Publication number
WO2017075802A1
WO2017075802A1 PCT/CN2015/093974 CN2015093974W WO2017075802A1 WO 2017075802 A1 WO2017075802 A1 WO 2017075802A1 CN 2015093974 W CN2015093974 W CN 2015093974W WO 2017075802 A1 WO2017075802 A1 WO 2017075802A1
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WIPO (PCT)
Prior art keywords
csi
priority
reports
report
index
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PCT/CN2015/093974
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English (en)
Inventor
Zukang Shen
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Lenovo Innovations Limited (Hong Kong)
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Application filed by Lenovo Innovations Limited (Hong Kong) filed Critical Lenovo Innovations Limited (Hong Kong)
Priority to CN201580084332.5A priority Critical patent/CN108370578B/zh
Priority to US15/774,184 priority patent/US10615860B2/en
Priority to EP15907644.7A priority patent/EP3342232B1/fr
Priority to PCT/CN2015/093974 priority patent/WO2017075802A1/fr
Publication of WO2017075802A1 publication Critical patent/WO2017075802A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection

Definitions

  • the subject matter disclosed herein relates generally to wireless communications and more particularly relates to channel state information (“CSI”) reporting in a wireless communication system.
  • CSI channel state information
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • ID TEID Tunnel Endpoint Identification
  • V-PLMN Visited Public Land Mobile Network
  • carrier aggregation may be supported.
  • a UE may be configured to report CSI periodically for each serving cell, in the form of one or more CSI processes.
  • CSI may generally include CQI, PMI, and RI.
  • Type 1 report supports CQI feedback for the UE selected sub-bands
  • Type 1a report supports subband CQI and second PMI feedback
  • Type 2b, and Type 2c reports support wideband CQI and PMI feedback
  • Type 2a report supports wideband PMI feedback
  • Type 3 report supports RI feedback
  • Type 4 report supports wideband CQI
  • Type 5 report supports RI and wideband PMI feedback
  • Type 6 report supports RI and PTI feedback.
  • the periodic CSI reporting instance (e.g., the subframe in which periodic CSI of a CSI process is reported) is configured according to higher layer signaling independently for each CSI process. Moreover, only one periodic CSI report corresponding to one CSI process is transmitted in a subframe by a UE, irrespective of the number of serving cells and CSI processes configured for the UE. In situations in which multiple periodic CSI reports corresponding to multiple CSI processes of a UE are configured to be transmitted in the same subframe, the UE selects one of the multiple CSI reports for transmission.
  • multiple periodic CSI reports corresponding to multiple CSI processes may be transmitted in a subframe by a UE. These multiple periodic CSI reports may be transmitted using a PUCCH.
  • a maximum payload size of the PUCCH is limited depending on the structure of the PUCCH and the channel condition between the UE and the eNB. In situations in which a total payload size of the CSI reports in a subframe exceed the maximum payload size of the PUCCH, periodic CSI report (s) of one or more of the multiple periodic CSI reports are dropped.
  • a UE may be configured with more than one PUCCH for transmission of multiple periodic CSI reports. These multiple PUCCHs may support different maximum payload sizes. The UE may select one of the multiple PUCCHs for transmission of the multiple periodic CSI reports. If a maximum payload size of a selected PUCCH cannot accommodate all periodic CSI reports in a subframe, periodic CSI report (s) of one or more of the multiple periodic CSI reports are dropped.
  • a UE may be configured to transmit HARQ-ACK and multiple periodic CSI reports using one PUCCH. However, if a maximum payload size of the PUCCH cannot accommodate all periodic CSI reports and HARQ-ACK in a subframe, periodic CSI report (s) of one or more of the multiple periodic CSI reports are dropped.
  • HARQ-ACK may refer collectively to positive acknowledge (“ACK”) and negative acknowledge (“NAK”) to a received DL TB.
  • the DL TBs may be carried on the PDSCH.
  • a maximum of two TBs may be transmitted on PDSCH in one serving cell and in a subframe.
  • the apparatus includes a processor that determines a priority for each channel state information (“CSI”) report of multiple CSI reports.
  • the priority for each CSI report is determined based on each of a CSI report type, a serving cell, a CSI process identification (“ID”) , and a CSI subframe set of the CSI report.
  • the processor determines one or more CSI reports of the multiple CSI reports to be transmitted in a subframe based at least partly on the priority for each CSI report.
  • the processor selects a channel for transmitting the one or more CSI reports in the subframe.
  • the apparatus includes a transmitter that transmits the one or more CSI reports using the selected channel in the subframe.
  • the priority for each CSI report is determined using one of the following equations:
  • P CSI-priority t ⁇ M ⁇ N ⁇ S+m ⁇ N ⁇ S+n ⁇ S+s.
  • the P CSI-priority is the priority for the CSI process; N is a number of different CSI report type levels; n is aCSI report type level index of the CSI report types and 0 ⁇ n ⁇ N-1; M is a number of serving cells for a remote unit; m is aserving cell index of the CSI report and 0 ⁇ m ⁇ M-1; S is a number of CSI processes for a serving cell and for a remote unit; s is aCSI process index of the CSI report and 0 ⁇ s ⁇ S-1; T is a number of CSI subframe sets for a serving cell and for a remote unit; t is a CSI subframe set index of the CSI report and 0 ⁇ t ⁇ T-1.
  • priorities of the multiple CSI reports are ordered from highest priority to lowest priority in ascending order of P CSI-priority .
  • the priority between any pair of CSI reports among the multiple CSI reports is determined according to: if the two CSI reports in the pair of CSI reports have a different CSI report type levelindex, the CSI report with a smaller CSI report type level index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index and a different CSI subframe set index, the CSI report with a smaller CSI subframe set index is of higher priority; if the two CSI reports in the pair of CSI reports havea same CSI report type level index, a same CSI subframe set index, and a different CSI process index, the CSI report with a smaller CSI process index is of higher priority; if the two CSI reports in the pair of CSI reports havea same CSI report type level index, a same CSI subframe set index, a same CSI process index, and a different serving cell index, the CSI report with a smaller serving cell index is of higher priority.
  • the processor determines the one or more CSI reports of the multiple CSI reports to be transmitted in the subframe by selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the selected CSI reports reaches a payload size of the selected channel.
  • the apparatus includes a receiver that receives signaling that indicates at least one channel that can be used for transmitting the one or more CSI reports in the subframe.
  • the processor selects the channel by, if a single channel is the only channel available for selection, selecting the single channel. In certain embodiments, the processor selects the channel by, if the multiple channels are available for selection and if a payload size of one or more channels of the multiple channels is greater than or equal to a number of CSI report bits corresponding to themultiple CSI reports, selecting the channel with a smallest payload size from the one or more channels. In various embodiments, the processor selects the channel by, if multiple channels are available for selection and if a payload size of each channel of the multiple channels is less than a number of CSI report bits corresponding to the multiple CSI reports, selecting the channel with a largest payload size from the multiple channels.
  • the processor determines a set of hybrid automatic repeat request acknowledgment (“HARQ-ACK”) bits to be transmitted in the subframe.
  • the processor may determine the one or more CSI reports of the multiple CSI reports to be transmitted in the subframe by selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the set of HARQ-ACK bits and the selected CSI reports reaches a payload size of the selected channel.
  • the transmitter transmits the one or more CSI reports using the selected channel in the subframe by transmitting the set of HARQ-ACK bits with the selected CSI reports using the selected channel.
  • a method for CSI reporting includes determining a priority for each channel state information (“CSI”) report of multiple CSI reports.
  • the priority for each CSI report is determined based on each of a CSI report type, a serving cell, a CSI process identification (“ID”) , and a CSI subframe set of the CSI report.
  • the method may include determining one or more CSI reports of the multiple CSI reports to be transmitted in a subframe based at least partly on the priority for each CSI report.
  • the method may include selecting a channel for transmitting the one or more CSI reports in the subframe.
  • the method may include transmitting the one or more CSI reports using the selected channel in the subframe.
  • the priority for each CSI report is determined using one of the following equations:
  • P CSI-priority t ⁇ M ⁇ N ⁇ S+m ⁇ N ⁇ S+n ⁇ S+s.
  • the P CSI-priority is the priority for the CSI process; N is a number of different CSI report type levels; n is aCSI report type level index of the CSI report types and O ⁇ n ⁇ N-1; M is a number of serving cells for a remote unit; m is aserving cell index of the CSI report and 0 ⁇ m ⁇ M-1; S is a number of CSI processes for a serving cell and for a remote unit; s is aCSI process index of the CSI report and 0 ⁇ s ⁇ S-1; T is a number of CSI subframe sets for a serving cell and for a remote unit; t is a CSI subframe set index of the CSI report and 0 ⁇ t ⁇ T-1.
  • priorities of the multiple CSI reports are ordered from highest priority to lowest priority in ascending order of P CSI-priority .
  • the priority between any pair of CSI reports among the multiple CSI reports is determined according to: if the two CSI reports in the pair of CSI reports have a different CSI report type levelindex, the CSI report with a smaller CSI report type level index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index and a different CSI subframe set index, the CSI report with a smaller CSI subframe set index is of higher priority; if the two CSI reports in the pair of CSI reports havea same CSI report type level index, a same CSI subframe set index, and a different CSI process index,the CSI report with a smaller CSI process index is of higher priority; if the two CSI reports in the pair of CSI reports havea same CSI report type level index, a same CSI subframe set index, a same CSI process index, and a different serving cell index, the CSI report with a smaller serving cell index is of higher priority.
  • determining the one or more CSI reports of the multiple CSI reports to be transmitted in the subframe includes selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the selected CSI reports reaches a payload size of the selected channel.
  • the method includes receiving signaling that indicates at least one channel that can be used for transmitting the one or more CSI reports in the subframe.
  • selecting the channel includes, if a single channel is the only channel available for selection, selecting the single channel. In certain embodiments, selecting the channel includes, if multiple channels are available for selection and if a payload size of one or more channels of the multiple channels is greater than or equal to a number of CSI report bits corresponding to themultiple CSI reports, selecting the channel with a smallest payload size from the one or more channels. In various embodiments, selecting the channel includes, if multiple channels are available for selection and if a payload size of each channel of the multiple channels is less than a number of CSI report bits corresponding to the multiple CSI reports, selecting the channel with a largest payload size from the multiple channels.
  • the method includes determining a set of hybrid automatic repeat request acknowledgment (“HARQ-ACK”) bits to be transmitted in the subframe.
  • determining the one or more CSI reports of the multiple CSI reports to be transmitted in the subframe includes selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the set of HARQ-ACK bits and the selected CSI reports reaches a payload size of the selected channel.
  • transmitting the one or more CSI repons using the selected channel in the subframe includes transmitting the set of HARQ-ACK bits with the selected CSI reports using the selected channel.
  • an apparatus in one embodiment, includes a receiver that receives one or more channel state information (“CSI”) reports on a channel in a subframe.
  • the apparatus may also include a processor that determines a priority for each CSI report of muhiple CSI reports.
  • the priority for each CSI report may bedetermined based on each of a CSI report type, a serving cell, a CSI process identification (“ID”) , and a CSI subframe set of the CSI report.
  • the processor may also determine which CSI repons of the multiple CSI reports are included in the one or more CSI reports based at least partly on the priority for each CSI report.
  • the priority for each CSI report is determined using one of the following equations:
  • P CSI-priority t ⁇ M ⁇ N ⁇ S+m ⁇ N ⁇ S+n ⁇ S+s.
  • the P CSI-priority is the priority for the CSI process; N is a number of different CSI report type levels; n is aCSI report type level index of the CSI report types and 0 ⁇ n ⁇ N-1; M is a number of serving cells for a remote unit; m is aserving cell index of the CSI report and 0 ⁇ m ⁇ M-1; S is a number of CSI processes for a serving cell and for a remote unit; s is aCSI process index of the CSI report and 0 ⁇ s ⁇ S-1; T is a number of CSI subframe sets for a serving cell and for a remote unit; t is a CSI subframe set index of the CSI report and 0 ⁇ t ⁇ T-1.
  • priorities of the multiple CSI reports are ordered from highest priority to lowest priority in ascending order of P CSI-priority .
  • the priority between any pair of CSI reports among the multiple CSI reports is determined according to: if the two CSI reports in the pair of CSI reports have a different CSI report type levelindex, the CSI report with a smaller CSI report type level index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index and a difterent CSI subframe set index, the CSI report with a smaller CSI subframe set index is of higher priority; if the two CSI reports in the pair of CSI reports havea same CSI report type level index, a same CSI subframe set index, and a different CSI process index, the CSI report with a smaller CSI process index is of higher priority; if the two CSI reports in the pair of CSI reports haven same CSI report type level index, a same CSI subframe set index, a same CSI process index, and a different serving cell index, the CSI report with a smaller serving cell index is of higher priority.
  • the processor determines which CSI reports of the multiple CSI reports are included in the one or more CSI reports by selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a number of the one or more CSI reports reaches a payload size of the channel.
  • the apparatus includes a transmitter that transmits signaling that indicates at least one channel that can be used for transmitting the one or more CSI reports in the subframe.
  • the receiver receives a set of hybrid automatic repeat request acknowledgment (“HARQ-ACK”) bits with the one or more CSI reports on the channel.
  • HARQ-ACK hybrid automatic repeat request acknowledgment
  • the processor determines which CSI reports of the multiple CSI reports are included in the one or more CSI reports by selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the set of HARQ-ACK bits and a number of the one or more CSI reports reaches a payload size of the channel.
  • Another method for CSI reporting includes receiving one or more channel state information (“CSI”) reports on a channel in a subframe.
  • the method includes determining a priority for each CSI report of multiple CSI reports.
  • the priority for each CSI report is determined based on each of a CSI report type, a serving cell, a CSI process identification (“ID”) , and a CSI subframe set of the CSI report.
  • the method includes determining which CSI reports of the multiple CSI reports are included in the one or more CSI reports based at least partly on the priority for each CSI report.
  • the priority for each CSI report is determined using one of the following equations:
  • P CSI-priority t ⁇ M ⁇ N ⁇ S+m ⁇ N ⁇ S+n ⁇ S+s.
  • the P CSI-priority is the priority for the CSI process; N is a number of different CSI report type levels; n is aCSI report type level index of the CSI report types and 0 ⁇ n ⁇ N-1; M is a number of serving cells for a remote unit; m is aserving cell index of the CSI report and 0 ⁇ m ⁇ M-1; S is a number of CSI processes for a serving cell and for a remote unit; s is aCSI process index of the CSI report and 0 ⁇ s ⁇ S-1; T is a number of CSI subframe sets for a serving cell and for a remote unit; t is a CSI subframe set index of the CSI report and 0 ⁇ t ⁇ T-1.
  • priorities of the multiple CSI reports are ordered from highest priority to lowest priodty in ascending order of P CSI-priotity .
  • the priority between any pair of CSI reports among the multiple CSI reports is determined according to: if the two CSI reports in the pair of CSI reports have a different CSI report type levelindex, the CSI report with a smaller CSI report type level index is of higher priority;if the two CSI reports in the pair of CSI reports have a same CSI report type level index and a different CSI subframe set index, the CSI report with a smaller CSIsubframe set index is of higher priority; if the two CSI reports in the pair of CSI reports havea same CSI report type level index, a same CSI subframe set index, and a different CSI process index, the CSI report with a smaller CSI process index is of higher priority; if the two CSI reports in the pair of CSI reports havea same CSI report type level index, a same CSI subframe set index, a same CSI process index, and a different serving cell index, the CSI report with a smaller serving cell index is of higher priority.
  • determining which CSI reports of the multiple CSI reports are included in the one or more CSI reports includes selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a number of the one or more CSI reports reaches a payload size of the channel.
  • the method includes transmitting signaling that indicates at least one channel that can be used for transmitting the one or more CSI reports in the subframe.
  • the method includes receiving a set of hybrid automatic repeat request acknowledgment (“HARQ-ACK”) bits with the one or more CSI reports on the channel.
  • HARQ-ACK hybrid automatic repeat request acknowledgment
  • determining which CSI reports of the multiple CSI reports are included in the one or more CSI reports includes selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the set of HARQ-ACK bits and a number of the one or more CSI reports reaches a payload size of the channel.
  • Figure 1 is a schematic block diagram illustrating one embodiment of a wireless communication system for CSI reporting
  • Figure 2 is a schematic block diagram illustrating one embodiment of an apparatus that may be used for CSI reporting
  • Figure 3 is a schematic block diagram illustrating another embodiment of an apparatus that may be used for CSI reporting
  • Figure 4 is a schematic block diagram illustrating one embodiment of a CSI report
  • Figure 5 is a schematic block diagram illustrating one embodiment of a system for selecting CSI reports to be transmitted
  • Figure 6 is a schematic block diagram illustrating another embodiment of a system for selecting CSI reports to be transmitted
  • Figure 7 is a schematic flow chart diagram illustrating one embodiment of a method for selecting a channel for CSI reporting
  • Figure 8 is a schematic flow chart diagram illustrating one embodiment of a method for CSI reporting.
  • Figure 9 is a schematic flow chart diagram illustrating another embodiment of a method for CSI reporting.
  • embodiments may be embodied as a system, apparatus, method, or program product. Accordingly, embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc. ) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit,” “module” or “system.” Furthermore, embodiments may take the form of a program product embodied in one or more computer readable storage devices storing machine readable code, computer readable code, and/or program code, referred hereafter as code. The storage devices may be tangible, non-transitory, and/or non-transmission. The storage devices may not embody signals. in a certain embodiment, the storage devices only employ signals for accessing code.
  • modules may be implemented as a hardware circuit comprising custom very-large-scale integration (“VLSI”) circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components.
  • VLSI very-large-scale integration
  • a module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
  • Modules may also be implemented in code and/or software for execution by various types of processors.
  • An identified module of code may, for instance, include one or more physical or logical blocks of executable code which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may include disparate instructions stored in different locations which, when joined logically together, include the module and achieve the stated purpose for the module
  • a module of code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices.
  • operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different computer readable storage devices.
  • the software portions are stored on one or more computer readable storage devices.
  • the computer readable medium may be a computer readable storage medium.
  • the computer readable storage medium may be a storage device storing the code.
  • the storage device may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, holographic, micromechanical, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • a storage device More specific examples (a non-exhaustive list) of the storage device would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (“RAM”) , a read-only memory (“ROM”) , an erasable programmable read-only memory (“EPROM”or Flash memory) , a portable compact disc read-only memory (“CD-ROM”) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • Code for carrying out operations for embodiments may be any number of lines and may be written in any combination of one or more programming languages including an object oriented programming language such as Python, Ruby, Java, Smalltalk, C++, or the like, and conventional procedural programming languages, such as the "C" programming language, or the like, and/or machine languages such as assembly languages.
  • the code may execute entirely on the user’s computer, partly on the user’s computer, as a stand-alone software package, partly on the user’s computer and partly on a remote computer or entirely on the remote computer or server.
  • the remote computer may be connected to the user’s computer through any type of network, including a local area network (“LAN”) or a wide area network (“WAN”) , or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider) .
  • LAN local area network
  • WAN wide area network
  • Internet Service Provider an Internet Service Provider
  • the code may also be stored in a storage device that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the storage device produce an article of manufacture including instructions which implement the function/act specified in the schematic flowchart diagrams and/or schematic block diagrams block or blocks.
  • the code may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the code which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
  • each block in the schematic flowchart diagrams and/or schematic block diagrams may represent a module, segment, or portion of code, which includes one or more executable instructions of the code for implementing the specified logical function (s) .
  • Figure 1 depicts an embodiment of a wireless communication system 100 for CSI reporting.
  • the wireless communication system 100 includes remote units 102 and base units 104. Even though a specific number of remote units 102 and base units 104are depicted in Figure 1, one of skill in the art will recognize that any number of remote units 102 and base units 104may be included in the wireless communication system 100.
  • the remote units 102 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (“PDAs”) , tablet computers, smart phones, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, modems) , or the like.
  • the remote units 102 include wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like.
  • the remote units 102 may be referred to as subscriber units, mobiles, mobile stations, users, terminals, mobile terminals, fixed terminals, subscriber stations, UE, user terminals, a device, or by other terminology used in the art.
  • the remote units 102 may communicate directly with one or more of the base units 104 via UL communication signals.
  • the base units 104 may be distributed over a geographic region.
  • a base unit 104 may also be referred to as an access point, an access terminal, a base, a base station, a Node-B, an eNB, a Home Node-B, a relay node, a device, or by any other terminology used in the art.
  • the base units 104 are generally part of a radio access network that includes one or more controllers communicably coupled to one or more corresponding base units 104.
  • the radio access network is generally communicably coupled to one or more core networks, which may be coupled to other networks, like the Internet and public switched telephone networks, among other networks. These and other elements of radio access and core networks are not illustrated but are well known generally by those having ordinary skill in the art.
  • the wireless communication system 100 is compliant with the LTE of the 3GPP protocol, wherein the base unit 104 transmits using an OFDM modulation scheme on the DL and the remote units 102 transmit on the UL using a SC-FDMA scheme. More generally, however, the wireless communication system 100 may implement some other open or proprietary communication protocol, for example, WiMAX, among other protocols. The present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol.
  • the base units 104 may serve a number of remote units 102 within a serving area, for example, a cell or a cell sector via a wireless communication link.
  • the base units 104 transmit DL communication signals to serve the remote units 102 in the time, frequency, and/or spatial domain.
  • anapparatus may determine a priority for each CSI report of multiple CSI reports.
  • the priority for each CSI report may be determined based on each of a CSI report type, a serving cell, a CSI process ID, and a CSI subframe set of the CSI report.
  • the apparatus may also determine one or more CSI reports of the multiple CSI reports to be transmitted in a subframe based at least partly on the priority for each CSI report.
  • the apparatus may select a channel for transmitting the one or more CSI reports in the subframe.
  • Theapparatus may transmit the one or more CSI reports using the selected channel in the subframe. Accordingly, the apparatus may send multiple CSI reports in one subframe.
  • CSI reports may be sent based on their overall priority as compared to all other CSI reports. Therefore, CSI reports may be sent to a base unit 104 quickly and efficiently.
  • a CSI report for a serving cell may be configured without a CSI process ID.
  • a default CSI process ID e.g., CSI process ID of 0
  • a CSI process index may be assigned to a CSI process ID.
  • a CSI report for a serving cell may be configured without a CSI subframe set. In such an embodiment, a default CSI subframe set (e.g., all DL subframe of the serving cell) may beassumed for such a CSI report.
  • an apparatus may receive one or more CSI reports on a channel in a subframe. Moreover, the apparatus may determine a priority for each CSI report of multiple CSI reports. In various embodiments, the priority for each CSI report may be determined based on each of a CSI report type, a serving cell, a CSI process ID, and a CSI subframe set of the CSI report. The apparatus may also determine which CSI reports of the multiple CSI reports are included in the one or more CSI reports based at least partly on the priority for each CSI report. Accordingly, multiple prioritized CSI reports may be received by the apparatus in a single subframe, thereby facilitating quick reception of CSI reports.
  • a CSI report for a serving cell may be configured without a CSI process ID.
  • a default CSI process ID e.g., CSI process ID of 0
  • a CSI process index may be assigned to a CSI process ID.
  • a CSI report for a serving cell may be configured without a CSI subframe set. In such an embodiment, a default CSI subframe set (e.g., all DL subframe of the serving cell) may be assumed for such a CSI report.
  • Figure 2 depicts one embodiment of an apparatus 200 that may be used for CSI reporting.
  • the apparatus 200 includes one embodiment of the remote unit 102.
  • the remote unit 102 may include a processor 202, a memory 204, an input device 206, a display 208, a transmitter 210, and a receiver 212.
  • the input device 206 and the display 208 are combined into a single device, such as a touchscreen.
  • the remote unit 102 may not include any input device 206 and/or display 208.
  • the remote unit 102 may include one or more of the processor 202, the memory 204, the transmitter 210, and the receiver 212, and may not include the input device 206 and/or the display 208.
  • Theprocessor 202 may include any known controller capable of executing computer-readable instructions and/or capable of performing logical operations.
  • the processor 202 may be a microcontroller, a microprocessor, a central processing unit (“CPU”) , a graphics processing unit (“GPU”) , an auxiliary processing unit, a field programmable gate array (“FPGA”) , or similar programmable controller.
  • the processor 202 executes instructions stored in the memory 204 to perform the methods and routines described herein.
  • the processor 202 is communicatively coupled to the memory 204, the input device 206, the display 208, the transmitter 210, and the receiver 212.
  • the processor 202 may determine a priority for each CSI report out of multiple CSI reports. In some embodiments, the processor 202 may determine one or more CSI reports to be transmitted in a subframe based at least partly on the priority for each CSI report. In various embodiments, the processor 202 may select a channel for transmitting the one or more CSI reports in the subframe.
  • the memory 204 in one embodiment, is a computer readable storage medium.
  • the memory 204 includes volatile computer storage media.
  • the memory 204 may include a RAM, including dynamic RAM (“DRAM”) , synchronous dynamic RAM (“SDRAM”) , and/or static RAM (“SRAM”) .
  • the memory 204 includes non-volatile computer storage media.
  • the memory 204 may include a hard disk drive, a flash memory, or any other suitable non-volatile computer storage device.
  • the memory 204 includes both volatile and non-volatile computer storage media.
  • the memory 204 stores data relating to information to be provided to another device.
  • the memory 204 also stores program code and related data, such as an operating system or other controller algorithms operating on the remote unit 102.
  • the input device 206 may include any known computer input device including a touch panel, a button, a keyboard, a stylus, a microphone, or the like.
  • the input device 206 may be integrated with the display 208, for example, as a touchscreen or similar touch-sensitive display.
  • the input device 206 includes a touchscreen such that text may be input using a virtual keyboard displayed on the touchscreen and/or by handwriting on the touchscreen.
  • the input device 206 includes two or more different devices, such as a keyboard and a touch panel.
  • the display 208 may include any known electronically controllable display or display device.
  • the display 208 may bedesigned to output visual, audible, and/or haptic signals.
  • the display 208 includes an electronic display capable of outputting visual data to a user.
  • the display 208 may include, but is not limited to, an LCD display, an LED display, an OLED display, a projector, or similar display device capable of outputting images, text, or the like to a user.
  • the display 208 may include a wearable display such as a smart watch, smart glasses, a heads-up display, or the like.
  • the display 208 may be a component of a smart phone, a personal digital assistant, a television, a table computer, a notebook (laptop) computer, a personal computer, a vehicle dashboard, or the like.
  • the display 208 includes one or more speakers for producing sound.
  • the display 208 may produce an audible alert or notification (e.g., a beep or chime) .
  • the display 208 includes one or more haptic devices for producing vibrations, motion, or other haptic feedback.
  • all or portions of the display 208 may be integrated with the input device 206.
  • the input device 206 and display 208 may form a touchscreen or similar touch-sensitive display.
  • the display 208 may be located near the input device 206.
  • the transmitter 210 is used to provide UL communication signals to the base unit 104 and the receiver 212 is used to receive DL communication signals from the base unit 104.
  • the transmitter 210 is used to transmit feedback information and/or an indication to the base unit 104.
  • the transmitter 210 may be used to transmit one or more CSI reports using a selected channel in a subframe.
  • the remote unit 102 may have any suitable number of transmitters 210 and receivers 212.
  • the transmitter 210 and the receiver 212 may be any suitable type of transmitters and receivers.
  • the transmitter 210 and the receiver 212 may be part of a transceiver.
  • Figure 3 depicts another embodiment of an apparatus 300 that may be used for CSI reporting.
  • the apparatus 300 includes one embodiment of the base unit 104.
  • the base unit 104 may include a processor 302, a memory 304, an input device 306, a display 308, a transmitter 310, and a receiver 312.
  • the processor 302, the memory 304, the input device 306, and the display 308 may be substantially similar to the processor 202, the memory 204, the input device 206, and the display 208 of the remote unit 102, respectively.
  • the processor 302 may be used to determine a priority for each CSI report out of multiple CSI reports.
  • the processor 302 may be used to determine which CSI reports of the multiple CSI reports are included in one or more received reportsbased at least partly on the priority for each CSI report.
  • the transmitter 310 is used to provide DL communication signals to the remote unit 102 and the receiver 312 is used to receive UL communication signals from the remote unit 102.
  • the receiver 312 is used to receive one or more CSI reports on a channel in a subframe.
  • Figure 4 is a schematic block diagram illustrating one embodiment of a CSI report 400.
  • the CSI report 400 includes a CSI report type 402, a serving cell 404, a CSI process ID 406, and a CSI subframe set 408.
  • a CSI report for a serving cell may be configured without a CSI process ID.
  • a default CSI process ID e.g., CSI process ID of 0
  • a CSI process index may correspond to a CSI process ID.
  • a CSI report for a serving cell may be configured without a CSI subframe set.
  • a default CSI subframe set (e.g., all DL subframe of the serving cell) may be assumed for such a CSI report.
  • the CSI report type 402 may include any predefined CSI report type that may define the information included in the CSI report 400.
  • CSI report types 402 may include: a Type 1 report that supports CQI feedback for the UE selected sub-bands; a Type 1a report that supports subband CQI and second PMI feedback; Type 2, Type 2b, and Type 2c reports that support wideband CQI and PMI feedback; a Type 2a report that supports wideband PMI feedback; a Type 3 report that supports RI feedback; a Type 4 report that supports wideband CQI; a Type 5 report that supports RI and wideband PMI feedback; and a Type 6 that report supports RI and PTI feedback.
  • each CSI report type 402 may have a priority relative to other CSI report types. For example, CSI report types 3, 5, and 6 may have higher priority than CSI report types 1, 1a, 2, 2a, 2b, 2c, and 4. In some embodiments, multiple CSI report types of the same priority are defined into a CSI report type level.
  • a remote unit 102 may be configured with multiple serving cells and each serving cell may be configured with at least one CSI process. Accordingly, the serving cell 404 indicates which serving cell the CSI report 400 corresponds to. Furthermore, a remote unit 102 may be configured with more than one CSI process for a serving cell. Therefore, the CSI process ID 406 indicates which CSI process the CSI report 400 corresponds to. Moreover, a remote unit 102 may be configured with multiple CSI subframe sets for a CSI process of a serving cell. Thus, the CSI subframe set 408 indicates which CSI subframe set the CSI report 400 corresponds to.
  • the priority of the CSI report 400 may be determined based on each of the CSI report type 402, the serving cell 404, the CSI process ID 406, and the CSI subframe set 408.
  • P CSI-priority is a number corresponding to the priority of a CSI report 400
  • N is a number of different CSI report type levels for CSI report types 402;
  • n is aCSI report type level of the CSI report 400 according to the CSI report types 402 and 0 ⁇ n ⁇ N-1;
  • M is a number of serving cells for a remote unit 102 (e.g., M may be a maximum number of serving cells that can be configured for a remote unit 102 or M may be a number of configured serving cells for a remote unit 102) ;
  • m is aserving cell index of the CSI report 400 according to the serving cell 404 and 0 ⁇ m ⁇ M-1;
  • S is a number of CSI processes for a serving cell and for a remote unit 102 (e.g., S may be a maximum number of CSI processes that can be configured for a serving cell and for a remote unit 102 or S may be a number of CSI processes configured for a serving cell and for a remote unit 102) ; the number of configured CSI processes can be different for different serving cells, i.e. the value of S can be a function of serving cell index m as S (m) ; in the following description, the dependency of S on m is omitted for simplicity but it can be easily extended to the case where the value of S is different for different serving cells;
  • T is a number of CSI subframe sets for a serving cell and for a remote unit 102 (e.g., T may be a maximum number of CSI subframe sets that can be configured for a serving cell and for a remote unit 102 or T may be a number of CSI subframe sets configured for a serving cell and for a remote unit 102) ; the number of configured CSI subframe sets can be different for different serving cells, i.e. the value of N can be a function of serving cell index m as N (m) ; in the following description, the dependency of N on m is omitted for simplicity but it can be easily extended to the case where the value of N is different for different serving cells;
  • priorities of the multiple CSI reports may be ordered from highest priority to lowest priority in ascending order of P CSI-priority (e.g., a priority of 0 is a higher priority than a priority of 1, a priority of 10 is a lower priority than a priority of 5) .
  • P CSI-priority t ⁇ M ⁇ N ⁇ S+m ⁇ N ⁇ S+n ⁇ S+s.
  • Each of the above equations defines a method to prioritize the multiple CSI reports by an order among a CSI report type 402, a serving cell 404, a CSI process ID 406, and a CSI subframe set 408.
  • the priority between any pair of CSI reports results to the following: if the two CSI reports in the pair of CSI reports havea different CSI report type level index, the CSI report with a smaller CSI report type level index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index and a different CSI subframe set index, the CSI report with a smaller CSI subframe set index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index, a same CSI subframe set index, and a different CSI process index, the CSI report with a smaller CSI process index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index, a same CSI subframe set index, a same CSI process index, and a different serving cell index,
  • the priority between any pair of CSI reports results to the following: if the two CSI reports in the pair of CSI reports havea different CSI report type level index, the CSI report with a smaller CSI report type level index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index and a different CSI subframe set index, the CSI report with a smaller CSI subframe set index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index, a same CSI subframe set index, and a different CSI process index, the CSI report with a smaller CSI process index is of higher priority; if the two CSI reports in the pair of CSI reports have a same CSI report type level index, a same CSI subframe set index, a same CSI process index, and a different serving cell index
  • Figure 5 is a schematic block diagram illustrating one embodiment of a system 500 for selecting CSI reports to be transmitted.
  • the system 500 includes a set of CSI reports 502 that are available to be transmitted.
  • the set of CSI reports 502 includes: a CSI report 504 having a determined priority of 1 and a size of 12 bits; a CSI report 506 having a determined priority of 8 and a size of 18 bits; a CSI report 508 having a determined priority of 3 and a size of 25 bits; a CSI report 510 having a determined priority of 2 and a size of 8 bits; and a CSI report 512 having a determined priority of 9 and a size of 15 bits.
  • the system 500 also includes a PUCCH in asubframe 514 selected to be used to transmit CSI report bits.
  • the PUCCH in a subframe 514 has a payload size of 50 bits.
  • the number of CSI reports, the priorities, and the sizes described herein are for exemplary purposes. As such, in various embodiments, the number of CSI reports, the priorities, and the sizes may be any suitable values.
  • multiple CSI reports from the set of CSI reports 502 may be transmitted in the PUCCH in a subframe 514.
  • the remote unit 102 may determine which CSI reports from the set of CSI reports 502 to transmit in the PUCCH in a subframe 514.
  • the remote unit 102 may select CSI reports from the set of CSI reports 502 in order from a highest priority to a lowest priority until a size of the selected CSI reports reaches a payload size of the PUCCH in asubframe 514.
  • the remote unit 102 may select the CSI reports 504, 510, and 508 for transmission in the PUCCH in a subframe 514 because the CSI reports 504, 510, and 508 have the highest priority of the set of CSI reports 502. Combined the CSI reports 504, 510, and 508 occupy 45 bits of the 50 available bits of the PUCCH in a subframe 514. No other CSI report of the set of CSI reports 502 will fit into the remaining 5 bits of the PUCCH in a subframe 514. Accordingly, in this example, CSI reports 504, 510, and 508 will be transmitted in the PUCCH in a subframe 514.
  • Figure 6 is a schematic block diagram illustrating another embodiment of a system 600 for selecting CSI reports to be transmitted.
  • the system 600 includes the set of CSI reports 502 and the PUCCH in a subframe 514 which are similar to the set of CSI reports 502 and the PUCCH in a subframe 514 of Figure 5.
  • the system 600 also includes HARQ-ACK bits 602 to be transmitted.
  • the HARQ-ACK bits 602 has a size of 20 bits in the illustrated embodiment, while in other embodiments, the size may be any suitable size.
  • the system 600 may determine the CSI reports of the set of CSI reports 502 for transmission by selecting the HARQ-ACK bits 602 and CSI reports in order from a highest priority to a lowest priority until the size of the HARQ-ACK bits 602 and the selected CSI reports reaches the payload size of the PUCCH in a subframe 514.
  • the HARQ-ACK bits 602 and CSI reports 504 and 510 occupy 40 bits out or the payload size of 50 bits of the PUCCH in a subframe 514. Accordingly, the HARQ-ACK bits 602 and CSI reports 504 and 510 will be transmitted in the PUCCH in a subframe 514.
  • Figure 7 is a schematic flow chart diagram illustrating one embodiment of a method for selecting a channel for CSI reporting.
  • the method 700 is performed by an apparatus, such as the remote unit 102.
  • the method 700 may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.
  • the method 700 may include determining702whether multiple channels are available for transmission of multiple CSI reports in a subframe.
  • one channel refers to one channel structure on a time-frequency resource (e.g., a PUCCH format 4 insome designated PUCCH format 4 time-frequency resource) . If there are not multiple channels available for selection (e.g., there is only one channel available for selection) , the method 700 may include selecting 704 a single available channel, then the method 700 may end.
  • the method 700 may include determining706whether the payload size of each channel of the multiple channels is less than a number of CSI report bits corresponding to all of the CSI reports in a same reporting instance (e.g., the sum of the CSI report bits for each of the CSI reports available for transmission in a subframe) .
  • the method 700 may select 708 a channel with the smallest payload size from the one or more channels having a payload size greater than or equal to the number of CSI report bits corresponding to all of the CSI reports in the same reporting instance, then the method 700 may end. For example, if the sum of all CSI report bits is 65, and there are four channels having respective payload sizes of 30, 45, 65, and 80, the method 700 will select 708 the channel with payload size 65. The selected channel is transmitted in the reporting instance, carrying one or more of the CSI reports available for transmission in the reporting instance.
  • the method 700 may select 710 a channel with the largest payload size from the multiple channels, then the method 700 may end. For example, if the sum of all CSI report bits is 65, and there are four channels having respective payload sizes of 30, 45, 50, and 60, the method 700 will select 710 the channel with payload size 60.
  • the selected channel is transmitted in the reporting instance, carrying one or more of the CSI reports available for transmission in the reporting instance.
  • Figure 8 is a schematic flow chart diagram illustrating one embodiment of a method 800 for CSI reporting.
  • the method 800 is performed by an apparatus, such as a remote unit 102.
  • the method 800 may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.
  • the method 800 may include determining802 a priority for each CSI report of multiple CSI reports.
  • the priority for each CSI report is determined based on each of a CSI report type, a serving cell, a CSI process ID, and a CSI subframe set of the CSI report.
  • the processor202 may determine 802 the priority for each CSI report of the multiple CSI reports.
  • the priority for each CSI report may be determine using one of the following equations:
  • P CSI-priority t ⁇ M ⁇ N ⁇ S+m ⁇ N ⁇ S+n ⁇ S+s.
  • P CSI-priority is the priority for the CSI process;
  • N is a number of different CSI report type levels;
  • n is aCSI report type level index of the CSI report types and 0 ⁇ n ⁇ N-1;
  • M is a number of serving cells for a remote unit;
  • m is aserving cell index of the CSI report and 0 ⁇ m ⁇ M-1;
  • S is a number of CSI processes for a serving cell and for a remote unit;
  • s is aCSI process index of the CSI report and 0 ⁇ s ⁇ S-1;
  • T is a number of CSI subframe sets for a serving cell and for a remote unit;
  • t is a CSI subffame set index of the CSI report and 0 ⁇ t ⁇ T-1.
  • priorities of the multiple CSI reports may beordered from highest priority to lowest priority in ascending order of P CSI-priority .
  • a CSI report for a serving cell may be configured without a CSI process ID.
  • a CSI report for a serving cell may be configured without CSI subframe sets.
  • the method 800 may also include determining 804 one or more CSI reports of the multiple CSI reports to be transmitted in a subframe based at least partly on the priority for each CSI report.
  • the processor 202 may determine 804 the one or more CSI reports of the multiple CSI reports to be transmitted in the subframe.
  • determining 804 the one or more CSI reports of the multiple CSI reports to be transmitted in the subframe includes selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the selected CSI reports reaches a payload size of a selected channel.
  • the method 800 may include selecting806 a channel for transmitting the one or more CSI reports in the subframe.
  • the processor 202 may select 806 the channel for transmitting the one or more CSI reports in the subframe.
  • selecting 806 the channel includes, if a single channel is the only channel available for selection, selecting the single channel.
  • selecting 806 the channel includes, if multiple channels are available for selection and if a payload size of one or more channels of the multiple channels is greater than or equal to a number of CSI report bits corresponding to the multiple CSI reports, selecting the channel with a smallest payload size from the one or more channels.
  • selecting 806 the channel includes, if multiple channels are available for selection and if a payload size of each channel of the multiple channels is less than a number of CSI report bits corresponding to the multiple CSI reports, selecting the channel with a largest payload size from the multiple channels.
  • the method 800 may include receiving signaling that indicates at least one channel that can be used for transmitting the one or more CSI reports in the subframe.
  • the receiver 212 may receive the signaling that indicates the at least one channel that can be used for transmitting the one or more CSI reports in the subframe.
  • the method 800 may include transmitting 808 the one or more CSI reports using the selected channel in the subframe, then the method 800 may end.
  • the transmitter 210 may transmit 808the one or more CSI reports using the selected channel in the subframe.
  • the method 800 may include determining a set of HARQ-ACK bits to be transmitted in the subframe.
  • determining 804 the one or more CSI reports of the multiple CSI reports to be transmitted in the subframe may include selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a size of the set of HARQ-ACK bits and the selected CSI reports reaches a payload size of the selected channel.
  • transmitting 808 the one or more CSI reports using the selected channel in the subframe may include transmitting the set of HARQ-ACK bits with the selected CSI reports using the selected channel.
  • Figure 9 is a schematic flow chart diagram illustrating another embodiment of a method 900 for CSI reporting.
  • the method 900 is performed by an apparatus, such as a base unit 104.
  • the method 900 may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.
  • the method 900 may include receiving 902 one or more CSI reports on a channel in a subframe.
  • the receiver 312 may receive 902 the one or more CSI reports on the channel in the subframe.
  • the method 900 may also include determining 904 a priority for each CSI report of multiple CSI reports.
  • the priority for each CSI report is determined based on each of a CSI report type, a serving cell, a CSI process ID, and a CSI subframe set of the CSI report.
  • the processor 302 may determine 904 the priority for each CSI report of the multiple CSI reports.
  • the priority for each CSI report may be determine using one of the following equations:
  • P CSI-priority t ⁇ M ⁇ N ⁇ S+m ⁇ N ⁇ S+n ⁇ S+s.
  • P CSI-priority is the priority for the CSI process; N is a number of different CSI report type levels; n is aCSI report type level index of the CSI report types and 0 ⁇ n ⁇ N-1; M is a number of serving cells for a remote unit; m is aserving cell index of the CSI report and 0 ⁇ m ⁇ M-1; S is a number of CSI processes for a serving cell and for a remote unit; s is aCSI process index of the CSI report and 0 ⁇ s ⁇ S-I; T is a number of CSI subframe sets for a serving cell and for a remote unit; t is a CSI subframe set index of the CSI report and 0 ⁇ t ⁇ T-1.
  • priorities of the multiple CSI repons may be ordered from highest priority to lowest priority in ascending order of P CSI-priority .
  • a CSI report for a serving cell may be configured without a CSI process ID.
  • a CSI report for a serving cell may be configured without CSI subframe sets.
  • the method 900 may also include determining 906 which CSI reports of the multiple CSI reports are included in the one or more CSI reports based at least partly on the priority for each CSI report, then the method 900 may end.
  • the processor 302 may determine 906 which CSI reports of the multiple CSI reports are included in the one or more CSI reports based at least partly on the priority for each CSI report.
  • determining 906 which CSI reports of the multiple CSI reports are part of the one or more CSI reports includes selecting CSI reports of the multiple CSI reports in order from a highest priority to a lowest priority until a number of the one or more CSI reports reaches a payload size of the channel.
  • the method 900 may include transmitting signaling that indicates at least one channel that can be used for transmitting the one or more CSI reports in the subframe.
  • the method 900 may include receiving a set of HARQ-ACK bits with the one or more CSI reports on the channel.
  • determining 906 which CSI reports of the multiple CSI reports are included in the one or more CSI reports may include selecting CSI reports of the multiple reports in order from a highest priority to a lowest priority until a size of the set of HARQ-ACK bits and a number of the one or more CSI reports reaches a payload size of the channel.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne des appareils, des procédés et des systèmes de rapports de CSI. Un appareil comprend un processeur qui détermine une priorité pour chaque rapport d'informations d'état de canal ("CSI") d'une pluralité de rapports. Dans certains modes de réalisation, la priorité de chaque rapport de CSI est déterminée en fonction de chaque type de rapport de CSI, d'une cellule de desserte, d'une identification ("ID") de processus de CSI et d'un ensemble de sous-trames de CSI du rapport de CSI. Dans divers modes de réalisation, le processeur détermine un ou plusieurs rapports de CSI de la pluralité de rapports de CSI devant être transmis dans une sous-trame en fonction au moins en partie de la priorité de chaque rapport de CSI. Dans certains modes de réalisation, le processeur sélectionne un canal de transmission d'un ou plusieurs rapports de CSI dans la sous-trame. Dans divers modes de réalisation, l'appareil comprend un émetteur qui transmet ledit rapport de CSI en utilisant le canal sélectionné dans la sous-trame.
PCT/CN2015/093974 2015-11-06 2015-11-06 Rapports de csi dans un système de communication sans fil WO2017075802A1 (fr)

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CN201580084332.5A CN108370578B (zh) 2015-11-06 2015-11-06 无线通信系统中的csi报告
US15/774,184 US10615860B2 (en) 2015-11-06 2015-11-06 CSI reporting in a wireless communication system
EP15907644.7A EP3342232B1 (fr) 2015-11-06 2015-11-06 Rapports de csi dans un système de communication sans fil
PCT/CN2015/093974 WO2017075802A1 (fr) 2015-11-06 2015-11-06 Rapports de csi dans un système de communication sans fil

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EP3342232B1 (fr) 2022-01-26
CN108370578B (zh) 2022-05-27
EP3342232A4 (fr) 2019-05-22
CN108370578A (zh) 2018-08-03
US10615860B2 (en) 2020-04-07
US20180331743A1 (en) 2018-11-15
EP3342232A1 (fr) 2018-07-04

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